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Finding the Fourth Proportional to 255,278.91, 383,154.81 and 129,008.01

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Solution

The fourth proportional to 255,278.91, 383,154.81 and 129,008.01 is: 193,631.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,278.91 : 383,154.81 = 129,008.01 : x
  2. Step 2: Convert to fraction form
    255,278.91/383,154.81 = 129,008.01/x
  3. Step 3: Cross multiply
    255,278.91x = 383,154.81 × 129,008.01
  4. Step 4: Simplify right side
    255,278.91x = 49,430,039,560.03
  5. Step 5: Solve for x
    x = 49,430,039,560.03/255,278.91
  6. Step 6: Final answer
    x = 193,631.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.